Improvement in roller-presses for polishing photographs



N. S. BOWDISH.

Roller- Presses for Polishing Photographs. N0.140,456.

Patented July I, 1873.

UNITED STATES PATENT OFFICE.

NELSON S. BOVVDISH, OF RIGHFIELD SPRINGS, NEXV YORK.

IMPROVEMENT IN ROLLER-PRESSES FOR POLISHING PHOTOGRAPHS.

Specification forming part of Letters Patent No. 140,456, dated July 1,1873; application filed I March 5, 1873.

To all whom it may concern:

Be it known that I, NELSON S. BOWDISH, of Riehfield Springs, ()tsegocounty, New York, have invented an Improvement in Presses for Rollingand Polishing Photographs, &c., of which the following is aspecification Presses have been made in which the bed is drawn throughbetween two rollers that are fixed in a stationary frame and revolved bya crank. In other cases the pressure-roller has been placed above thebed and beneath ways that applied the pressure. In the first instancethe bed was movable and not well adapted to polishing photographs in thesecond case the ways being above the bed interfered with introducing andremoving the photographs.

A printing-press has been made with a traveling frame carrying rollersabove and below the stationary bed; but the same is not adapted topolishing photographs.

My invention consists in combining, with a polished bed, a travelingpressure-roller, a lower or resisting roller, and adjusting mechanism,whereby the photograph is polished by the rolling pressure and theresisting pressure is below the bed near the same point, so that the bedand other parts can be made very light without risk of breaking.

In the drawing,Figure l is a longitudinal vertical section of themachine, and Fig. 2 is a cross-section of the bed with the journatbox atone end also in section.

The bed a is supported upon the legs b, and it is to be smooth upon itssurface, and either perfectly fiat or slightly arched in shape, ifdesired. The surface may be metallic and polished, or any suitablematerial may be employed. A carriage, d, with rollers e e, is suspendedfrom the journal-boxes f of the roller g, and in the boxes f there areopenings into which the screws 1' pass. The downward prismaticprojections 1" of the journal-boxesfenter boxes at the ends of thecarriage (I, and the screws 43 pass in from below through the carriage(1 into the portions 1" of the journalboxesj', so that by revolving thescrews ithe proximity of the rollers e and carriage cl to the bed may beregulated and the pressure of the roller 9 upon the picture be therebydetermined. The worm-pinions l 1 upon the shalt a gear into the wheels 0upon the screws 'i, so as to turn them simultaneously in eitherdirection and raise or lower the carriage d, and increase or lessen thepressure of the roller on the picture. The crank t is employed to gurnthe roller 9 and move the same along the I remark that the rollers c 6may extend entirely across below the bed a, if desired, and the bed amay have either a flat or an arched surface, and the crank t may beapplied to one of the rollers 0 instead of, the roller g, and there maybe teeth adjacent to the rollers 6, taking into rack-teeth upon theunder side of the bed.

The bed a may be more or less heated to promote the polishing of thepictures.

I claim as my invention- The stationary polished bed, in combinationwith the rollers g and 0, carriage d, and adjusting mechanism,substantially as and for the purposes set forth.

Signed by me this 27th day of February, A.

N. S. BOWDISH.

Witnesses:

G. M. FERRELL, A. H. ELwoon.

